Saki70,
When I first set up my system, about 6 years ago, I had an electritian install a standard dedicated line (20amp breaker,12/2wire,$.89 Leviton outlet). I had all sorts of line noise issues, and then got onto the line conditioning merry-go-round, after time and many dollars later I had achieved an acceptical degree of success. Or so I thought.
I found out about this Iso line at my local H-Depot. While searching for materials for another project I struck up a chat with the sales guy helping me. Truns out he teaches electrical engineering at our county vocational school. He told me about the iso line and how he rewired the computer room at the school, he recieved much praise from the faculty, the screens were much clearer and the computers worked alot better. So I thought this must be good for audio, and it was.
Think about it, in relation to system cost, this is a very low cost up-grade.
Perhaps a question to the guys selling the better outlets would be a goood start.
Albert Porter is selling his "porter pots" in the conditioner section of this site. Check him out he has been around a long time and is a very respected A-gon member.
Hope you get the answers you are looking for.
Good luck,
Rodge